We don’t currently have a feature that covers Singularity 3.0 – there were quite a few changes in that series, not least of which was its rewrite in Go which increased the complexity of installation quite significantly!

It looks like it’s possible to create/build an RPM that might cover your needs, and if you’re able to create a customization profile that covers the steps required for installation we’d be happy to look into adding it into the list of feature profiles.